<html>
<head>
</head>
<body>
    A: <input type="text" id="a"/><br/>
    B: <input type="text" id="b"/><br/>
    <input type="button" value="Calculate GCD" id="button"/> <br/>
    C: <span id="c"/>
    <script src="jquery.min.js"></script>
    <script src="index.js"></script>
</body>
</html>